Crystal structure and Hirshfeld surface analysis of 1-[(benzyl­dimethyl­sil­yl)meth­yl]-1-ethyl­piperidin-1-ium ethane­sulfonate

The title mol­ecular salt, C(17)H(30)NSi(+)·C(2)H(5)O(4)S(−), belongs to the class of a-amino­silanes and was synthesized by the alkyl­ation of 1-[(benzyl­dimethyl­sil­yl)meth­yl]piperidine using diethyl sulfate. This achiral salt crystallizes in the chiral space group P2(1). One of the Si—C bonds in the cation is unusually long [1.9075 (12) Å], which correlates with the adjacent quaternary N(+) atom and was verified by quantum chemical calculations. In the crystal, the components are linked by weak C—H⋯O hydrogen bonds: a Hirshfeld surface analysis was performed to further investigate these inter­molecular inter­actions and their effects on the crystal packing.